That’s my first move Andy. Do you use em in Idaho? How do they do?
I do use them, but I run a 54 caliber, so I use the 525 grain/.541 bullet. Accuracy is great with it, running 1.5" to 2.5" at 100 yards, with peep sights....depending on me, more than the rifle or load. The secret to these bullets, is to use an over powder felt, under the bullet.....one size larger than your bore. I use a 58 caliber felt in my 54, if you are shooting a 50 cal, use a 54 caliber felt. It cut my groups in half.
While the bullet is very accurate, it is soft. I shot a cow elk last year at 14 yards on the leading edge of the near shoulder/at the base of the neck. It killed the elk stone dead, but she stopped the bullet. I got 2 mangled pieces back, that weighed a total of 468 grains. With soft lead, that is what happens when you drive them hard, up close. The bullet behaves perfectly at 100-125 yards. So, it's kinda pick your poison.....drive them hard for longer shots, or drive them slower for closer shots.
So....during the off season, I have been experimenting with paper patched bullets. Mixing a harder alloy, that is still accurate, and will give me performance up close and further out. I'm casting a .533 bullet with a .419 flat nose...smooth sided that measures .537 after being wrapped, and weighs 520 grains. I'm getting 2.5" groups at 100 yards, and the bullet holds it shape much better, while penetrating 12"-18" of dirt bank. Very promising, so far....
So.....I think no excuses are great bullets, though soft. I don't know of any commercially made, full bore diameter bullet, that isn't. IF you put it in the ribs, I'm sure it will work just fine....even more so, with deer. I'm just trying to make a better mouse trap....nothing against their product.
Sorry about being so long winded with my answer....but that's been my experience with them, and where I'm at now.
Andy3